#define LLVM_CODEGEN_MACHINEFRAMEINFO_H
#include "llvm/ADT/SmallVector.h"
-//#include "llvm/ADT/IndexedMap.h"
-#include "llvm/System/DataTypes.h"
+#include "llvm/Support/DataTypes.h"
#include <cassert>
#include <vector>
namespace llvm {
class raw_ostream;
-class TargetData;
+class DataLayout;
class TargetRegisterClass;
class Type;
class MachineFunction;
class MachineBasicBlock;
-class TargetFrameInfo;
+class TargetFrameLowering;
class BitVector;
+class Value;
+class AllocaInst;
/// The CalleeSavedInfo class tracks the information need to locate where a
-/// callee saved register in the current frame.
+/// callee saved register is in the current frame.
class CalleeSavedInfo {
unsigned Reg;
int FrameIdx;
// protector.
bool MayNeedSP;
+ /// Alloca - If this stack object is originated from an Alloca instruction
+ /// this value saves the original IR allocation. Can be NULL.
+ const AllocaInst *Alloca;
+
// PreAllocated - If true, the object was mapped into the local frame
// block and doesn't need additional handling for allocation beyond that.
bool PreAllocated;
StackObject(uint64_t Sz, unsigned Al, int64_t SP, bool IM,
- bool isSS, bool NSP)
+ bool isSS, bool NSP, const AllocaInst *Val)
: SPOffset(SP), Size(Sz), Alignment(Al), isImmutable(IM),
- isSpillSlot(isSS), MayNeedSP(NSP), PreAllocated(false) {}
+ isSpillSlot(isSS), MayNeedSP(NSP), Alloca(Val), PreAllocated(false) {}
};
/// Objects - The list of stack objects allocated...
/// StackProtectorIdx - The frame index for the stack protector.
int StackProtectorIdx;
+ /// FunctionContextIdx - The frame index for the function context. Used for
+ /// SjLj exceptions.
+ int FunctionContextIdx;
+
/// MaxCallFrameSize - This contains the size of the largest call frame if the
/// target uses frame setup/destroy pseudo instructions (as defined in the
/// TargetFrameInfo class). This information is important for frame pointer
/// CSIValid - Has CSInfo been set yet?
bool CSIValid;
- /// SpillObjects - A vector indicating which frame indices refer to
- /// spill slots.
- SmallVector<bool, 8> SpillObjects;
-
- /// TargetFrameInfo - Target information about frame layout.
+ /// TargetFrameLowering - Target information about frame layout.
///
- const TargetFrameInfo &TFI;
+ const TargetFrameLowering &TFI;
/// LocalFrameObjects - References to frame indices which are mapped
/// into the local frame allocation block. <FrameIdx, LocalOffset>
/// LocalFrameSize - Size of the pre-allocated local frame block.
int64_t LocalFrameSize;
- /// LocalFrameBaseOffset - The base offset from the stack pointer at
- /// function entry of the local frame blob. Set by PEI for use by
- /// target in eliminateFrameIndex().
- int64_t LocalFrameBaseOffset;
-
/// Required alignment of the local object blob, which is the strictest
/// alignment of any object in it.
unsigned LocalFrameMaxAlign;
/// just allocate them normally.
bool UseLocalStackAllocationBlock;
+ /// Whether the "realign-stack" option is on.
+ bool RealignOption;
public:
- explicit MachineFrameInfo(const TargetFrameInfo &tfi) : TFI(tfi) {
+ explicit MachineFrameInfo(const TargetFrameLowering &tfi, bool RealignOpt)
+ : TFI(tfi), RealignOption(RealignOpt) {
StackSize = NumFixedObjects = OffsetAdjustment = MaxAlignment = 0;
HasVarSizedObjects = false;
FrameAddressTaken = false;
AdjustsStack = false;
HasCalls = false;
StackProtectorIdx = -1;
+ FunctionContextIdx = -1;
MaxCallFrameSize = 0;
CSIValid = false;
LocalFrameSize = 0;
- LocalFrameBaseOffset = 0;
LocalFrameMaxAlign = 0;
UseLocalStackAllocationBlock = false;
}
int getStackProtectorIndex() const { return StackProtectorIdx; }
void setStackProtectorIndex(int I) { StackProtectorIdx = I; }
+ /// getFunctionContextIndex/setFunctionContextIndex - Return the index for the
+ /// function context object. This object is used for SjLj exceptions.
+ int getFunctionContextIndex() const { return FunctionContextIdx; }
+ void setFunctionContextIndex(int I) { FunctionContextIdx = I; }
+
/// isFrameAddressTaken - This method may be called any time after instruction
/// selection is complete to determine if there is a call to
/// \@llvm.frameaddress in this function.
/// the local object block.
int64_t getLocalFrameObjectCount() { return LocalFrameObjects.size(); }
- /// setLocalFrameBaseOffset - Set the base SP offset of the local frame
- /// blob.
- void setLocalFrameBaseOffset(int64_t o) { LocalFrameBaseOffset = o; }
-
- /// getLocalFrameBaseOffset - Get the base SP offset of the local frame
- /// blob.
- int64_t getLocalFrameBaseOffset() const { return LocalFrameBaseOffset; }
-
/// setLocalFrameSize - Set the size of the local object blob.
void setLocalFrameSize(int64_t sz) { LocalFrameSize = sz; }
/// getLocalFrameMaxAlign - Return the required alignment of the local
/// object blob.
- unsigned getLocalFrameMaxAlign() { return LocalFrameMaxAlign; }
+ unsigned getLocalFrameMaxAlign() const { return LocalFrameMaxAlign; }
/// getUseLocalStackAllocationBlock - Get whether the local allocation blob
/// should be allocated together or let PEI allocate the locals in it
assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
"Invalid Object Idx!");
Objects[ObjectIdx+NumFixedObjects].Alignment = Align;
- MaxAlignment = std::max(MaxAlignment, Align);
+ ensureMaxAlignment(Align);
+ }
+
+ /// getObjectAllocation - Return the underlying Alloca of the specified
+ /// stack object if it exists. Returns 0 if none exists.
+ const AllocaInst* getObjectAllocation(int ObjectIdx) const {
+ assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
+ "Invalid Object Idx!");
+ return Objects[ObjectIdx+NumFixedObjects].Alloca;
}
/// NeedsStackProtector - Returns true if the object may need stack
///
unsigned getMaxAlignment() const { return MaxAlignment; }
- /// setMaxAlignment - Set the preferred alignment.
- ///
- void setMaxAlignment(unsigned Align) { MaxAlignment = Align; }
+ /// ensureMaxAlignment - Make sure the function is at least Align bytes
+ /// aligned.
+ void ensureMaxAlignment(unsigned Align);
/// AdjustsStack - Return true if this function adjusts the stack -- e.g.,
/// when calling another function. This is only valid during and after
bool isSpillSlotObjectIndex(int ObjectIdx) const {
assert(unsigned(ObjectIdx+NumFixedObjects) < Objects.size() &&
"Invalid Object Idx!");
- return Objects[ObjectIdx+NumFixedObjects].isSpillSlot;;
+ return Objects[ObjectIdx+NumFixedObjects].isSpillSlot;
}
/// isDeadObjectIndex - Returns true if the specified index corresponds to
/// a nonnegative identifier to represent it.
///
int CreateStackObject(uint64_t Size, unsigned Alignment, bool isSS,
- bool MayNeedSP = false) {
- assert(Size != 0 && "Cannot allocate zero size stack objects!");
- Objects.push_back(StackObject(Size, Alignment, 0, false, isSS, MayNeedSP));
- int Index = (int)Objects.size() - NumFixedObjects - 1;
- assert(Index >= 0 && "Bad frame index!");
- MaxAlignment = std::max(MaxAlignment, Alignment);
- return Index;
- }
+ bool MayNeedSP = false, const AllocaInst *Alloca = 0);
/// CreateSpillStackObject - Create a new statically sized stack object that
/// represents a spill slot, returning a nonnegative identifier to represent
/// it.
///
- int CreateSpillStackObject(uint64_t Size, unsigned Alignment) {
- CreateStackObject(Size, Alignment, true, false);
- int Index = (int)Objects.size() - NumFixedObjects - 1;
- MaxAlignment = std::max(MaxAlignment, Alignment);
- return Index;
- }
+ int CreateSpillStackObject(uint64_t Size, unsigned Alignment);
/// RemoveStackObject - Remove or mark dead a statically sized stack object.
///
/// variable sized object is created, whether or not the index returned is
/// actually used.
///
- int CreateVariableSizedObject(unsigned Alignment) {
- HasVarSizedObjects = true;
- Objects.push_back(StackObject(0, Alignment, 0, false, false, true));
- MaxAlignment = std::max(MaxAlignment, Alignment);
- return (int)Objects.size()-NumFixedObjects-1;
- }
+ int CreateVariableSizedObject(unsigned Alignment);
/// getCalleeSavedInfo - Returns a reference to call saved info vector for the
/// current function.
projects / oota-llvm.git / blobdiff